学进去-教育应平等而普惠
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类型:听音,选择正确答案
难度系数:0.85
所属科目:小学英语
听录音,选出你所听到的句子的应答语,将其字母序号填入题前括号内。
(      ) 1. A. Yes, she is.          B. He’s Wang Hong.            C. Yes, he is.
(      ) 2. A. It’s in the bag.          B. It’s blue and red.          C. Yes, it is.
(      ) 3. A. Yes, he is.            B. Her name is Lucy.          C. His name is John.
(      ) 4. A. Yes, they do.          B. Yes, please.          C. They’re on the sofa.
(      ) 5. A. Yes, there are.               B. They are on the desk.       C. Three. 
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19

y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19
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